from typing import Any, Optional, Tuple

def qt6_force_xcb_on_linux() -> None: ...
def load_pyqt5() -> bool: ...
def load_pyside2() -> bool: ...
def load_pyqt6() -> bool: ...
def load_pyside6() -> bool: ...
def load_wx() -> bool: ...
def loaded_backend() -> bool: ...
def get_loaded_backend() -> str: ...
def load_any_qt_backend() -> bool: ...
def load_backend(backend_str: Optional[str] = None) -> str: ...
def get_qt_modules() -> Tuple[Any, Any, Any, Any]: ...
